Heating apparatus



May 19, 1931. w. L. cLousE HEATING APPARATUS Filed March l5. 1929 Patented May 19, 1931 UNITED STATES WILLIAM L. CLOUSE, OF TIFFIN, OHIO HEATING ArrAnATUs AppIication led March l5, 1929. Serial No. 347,402.

This invention relates to apparatus designed primarily for use in heating metal blanks to be made into forgings or other relatively small articles. e

It is an object of the invention to provide an apparatus utilizing an endless carrler constituting the secondary of a transformer whereby the induced current in the secondary acts to raise the held articles to a desired temperature so that they can be properly shaped after being removed from the apparatus.

Another object is to provide heating apparatus of this character in which the primary is so constructed as to be kept relatively cool.

With the foregoing and other objects in view which will appear as the description proceeds the invention resides in the combination and arrangement of parts andk in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may beI made within the scope of what is claimed' without departing from the spirit of the in`v ntion.

In the accompanying drawings the preferred form of the invention has been shown more or less in diagram.

In said drawingsg Figure 1 is an elevation of the heating apparatus constituting the present invention, a water supply tank in communication therewith being shown'in section and broken away.

Figure 2 is a section on line 2 2, Figure 1, the core and the track wheels being in elevation.

Figure 3` is a diagram showing the primaryin perspective.

Referring to the figures by characters of reference, 1 designates the usual laminated or built up core of a transformer on which is mounted a primary coil formed of a tube of copper or the like indicated at 2 the ends of which can be in communication with extensions 3 and 4 opening into a water tank 5 or other container of a cooling medium. This primary may be provided with any desired number of turns and the number of turns in circuit with a generator can be regulated by means of a switch and taps indicated generally at 6.

A metal rim 7 formed of segments spaced apart at their ends by interpose'd insulation 8, is supported by and ada ted to rotate between wheels 9.' This rim extends around and is concentric with the secondary which comprises a heating ring 10 preferably of nichrome, this heatlng ring being provided with an outer sheathing l1 and an inner sheathing 12 of a material that serves both as a heat insulator and an insulator of electricity. This material can be lire clay.

Extending through the heating ring 10 are openings 13 each of which is designed to receive one of the blanks to be heated. These openings may be arranged in one or more annular series.

In practice a current of desired voltage is directed into the primary, the temperature of the said primary being kept down by the cooling medium circulating therethrough from the container 5.

The induced current in the secondary will heat the ring 10 to a high temperature. The user can insert a blank or the like into one of the openings 13 and as the secondary revolves/the temperature of the inserted blank will be gradually raised. l/Vhen the blank is finally brought to its point of starting, it will have been heated to such `a temperature that it can be worked readily. It can be removed by inserting a new blank which will act to push the heated blank out of the opening. Obviously by having a series ofl openings, a 8" number of blanks can be heated simultaneously and they can be moved successively to the point where the secondary is to be refilled.

It is of course known that blanks have been heated electrically but these blanks have been used as a part of the electric circuit and the oxide on the outer surfaces of the blanks has tended to interfere with the proper heating of the metal. By utilizing heating means 95 such as described, the blanks can be inserted in the respective openings and gradually and thoroughly heated preparatory to being removed and shaped. The sheathing indicated at 11 and 12 serves to limit radiation of heat 99 y insulating means.

from the secondary and also constitutes an eiicient insulating means.

By forming the outer rim of segments that are insulated from each other, said rim is prevented from acting as a secondary.

It is to be understood of course that the tubular coil of the primary is provided with insulation.

What is claimed is:

\ 1. Heating apparatus including a transformer core, a primary thereon, means for cooling the primary, a secondary extending around the primary and including a ring having an opening for the reception of an object to be heated, and sheathing on the inner and outer peripheries of the ring, said sheathing constituting heat and electricity 2.- Heating apparatus including a transformer core, a primary`thereon, means for cooling the primary, a secondary extending around the'primary and including a ring having an opening for the reception of an obj ect to be heated, and sheathing on the inner and outer peripheries of the ring, said sheathing constituting heat and electricity insulating means, the said secondary being mounted for rotation relative to the primary.

3. Heating apparatus including a transformer core, a `primary thereon, means for cooling the primary, a secondary extending around the primary and including a ring having an opening for the reception of an object to be heated, and sheathing on the inner and outer peripheries of the ring, said sheathing constituting heat and electricity insulating means, the said secondary being mounted for rotation relative to the primary, a segmental outer rim rotatable With the secondary and comprising spaced insulated segments, and supporting means engaging the outer rim. Y

4. Apparatus of the class described including a transformer core, a primary thereon comprising tubular coils, means for setting up a circulation of a cooling medium through the coils of the primary, and means for simultaneously heating and conveying articles, said means including a secondary mounted for movement relative to the primary and having spaced recesses for the reception of the articles to be heated and conveyed, said secondary including a ring and Sleathing on the inner and outer peripheries o the ring constituting heat and electricity in ulating means.

n testimony that I claimthe foregoing as my own, I have hereto aflixed my'signature.

WILLIAM L. CLOUSE. 

